Larry.,
The new EV are much better with protection than the old school EV were and there are quite few safeguards in there so the handydolts can not mess it up by tapping to the battery supply to run the inverter { due most modern EV battery voltage is 300 or more so it will not take much to make a heckva a bang if not heed with warning. }
As far for charger most new EV will have main charger controller in the EV as part of the vechile so there is a very small chance someone will find a way with it and they also designed they can take incomming " shore " power but no outgoing power back to the system at all.
For the charging station I know more and more are start to show up more places and that may cause some issue with the POCO network when the EV get more common I am not too suprised that you may end up useing triphase system for quick charging system.
Merci,
Marc
